Full Product Manual

14
Troubleshooting (cont’d)
Motor stalls /
fuse blows or
thermal
protector trips
repeatedly.
1. Bypass valve sticking.
Remove and inspect valve; must
move freely & be free of debris.
2. Low voltage.
Check incoming line voltage while
pump is running.
3. Excessive rotor or vane
wear.
Check rotor & vanes for excessive
wear or damage.*
4. Debris in pump cavity. Clean debris from pump cavity.
Motor
overheats.
1. Pumping high viscosity
fluids.
These fluids can only be pumped
for short periods of time (less than
30 minutes duty cycle).
2. Clogged screen. Remove and clean screen.
3. Restricted suction pipe. Remove and clean pipe.
4. Motor failure. Return to place of purchase.
5. Pump rotor lock-up.
Clean and check pump rotor and
vanes.*
Motor
Inoperative.
1. No power Check incoming power.
2. Switch failure. Replace switch (KIT120SW).
3. Motor failure. Return to place of purchase.
4. Thermal protector
failure.
Return to place of purchase.
5. Incorrect/loose wiring. Check wiring.
Fluid leakage.
1. Bad o-ring gasket. Check all o-ring gaskets.
2. Dirty shaft seal. Clean seal & seal cavity.
3. Bad shaft seal. Replace seal.
4. Incompatible fluid.
Refer wetted parts list to fluid
manufacturer.
5. Loose fasteners. Tighten fasteners.
Pump hums but
will not operate.
1. Motor failure. Return to place of purchase.
2. Broken rotor key. Remove all debris & replace key.
Bold text indicates service that cannot be performed by the owner; pump must be returned to the point of purchase for
this type of service.
* Repairs marked with an asterisk (*) will require Repair Kit KIT120RG Kit includes replacement rotor and new vanes,
as well as a number of other important seals and components to complete the repair. Details of this kit are on page 18.
WARNING! Disconnect electrical power and relieve any pressure in the lines
prior to servicing this pump! Failure to do so can result in damage to the
equipment and personal injury or death!
Dimensional Information